Debian 5 Unable to acces Websites

Now my mail work internaly and I can send outside too but i can't access any website (from domain name) (I can acces main website from IP) and can't send e-mail from the outside just wondering if someone could help.

1) Select the correct (internal) IP address in the website settings instead of *. If the IP is not listed, add it under System > server IP.
2) Forward port 80 and 443 from your router to your server.
3) Add DNA A-Records for your domain name and subdomains like www that point to the external IP of the router (not the internal IP!)

your problem is not in your mail/postfix configuration.
i'd try to ping and dig your main domain (com-tec.ca) and its resolve correctly, but in your mercure machine still didnt resolve and time out.
You can wait the propagation like till's said above if your dns configuration is correct.
Just corious, do you had point your mercure in your domain manager correctly in futurcom.ca ?
from whois answer : your domain com-tec.ca is managed in futurcom.ca (cmiiw)
--- whois ---
$ whois com-t*c.ca
Domain name: com-t*c.ca
Name servers:
ns2.futurcom.ca ***.***.***.141
ns1.futurcom.ca ***.***.***.140